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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:01 
Transit: 12:56 
Sunset: 20:52
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All Constellations » Monoceros » 

21 Monocerotis

Below the horizon.  Rise: 10:18 | Tran: 16:14 | Set: 22:10
Alt: -19.03°   Az: 295.03°   Direction: West-North-West

21 Monocerotis is a variable main-sequence star of spectral class A8 in the constellation of Monoceros.

21 Monocerotis visual magnitude is 5.45. Because of its faintness, 21 Monocerotis is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of 21 Monocerotis star
DSS2 image of 21 Monocerotis. The red arrow shows the motion of 21 Monocerotis during the next 10000 years (-5.17 arcmin in Right Ascension and -1.83 arcmin in declination);

Celestial Coordinates

Apparent

07h 12m 41s
-00° 20’ 44”
08h 04m 15s
15h 16m 57s

J2000

07h 11m 23s
-00° 18’ 06”

Galactic Coordinates

215.48°
4.3°

Finder Chart

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Finder chart for 21 Monocerotis.

Magnitude, Color, Spectral Class

5.45
Main-sequence

0.93
A8V
7526K

The red dot in the diagram below shows where 21 Monocerotis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 21 Monocerotis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

21 Monocerotis is distant 261.01 light years from the Sun and it is moving far from the Sun at the speed of 30 kilometers per second.

80.06
261.01
30 km/s
-0.031 arcsec/y
-0.011"/y

Alternative Designations

21 Monocerotis
SAO134316
SAO134316

Visibility from Your Location

Today's 21 Monocerotis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 90.3°
Max altitude: 38.2°
Azimuth: 269.7°